#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
int main()
{
    printf("hello printf\n");
    fprintf(stdout,"hello fprintf\n");
    fputs("hello fputs\n",stdout);

    const char* msg="hello write\n";
    write(1,msg,strlen(msg));
    fork();
    return 0;
}

